package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dao.CategoryDao;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.ParameterResolutionDelegate;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryDao,Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;
    /**
     * 根据id删除分类,删除之前需要进行判断分类是否关联了菜品或者套餐
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishQueryWrapper = new LambdaQueryWrapper<>();
        // 添加查询条件,根据分类id进行查询
        dishQueryWrapper.eq(Dish::getCategoryId, id);
        int count = dishService.count(dishQueryWrapper);
        // 查询当前分类是否关联了菜品,如果进行了关联,抛出一个业务异常
        if (count > 0){
            // 已经关联了菜品,抛出一个业务异常
            throw new CustomException("当前分类下关联了菜品,不能删除");
        }
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        // 添加查询条件,根据分类id进行查询
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(setmealLambdaQueryWrapper);
        // 查询当前分类是否关联了菜品,如果进行了关联,抛出一个业务异常
        if (count1 > 0){
            // 已经关联了套餐,抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐,不能删除");
        }
        // 正常删除分类
        super.removeById(id);
    }
}
